/* JAI-Ext - OpenSource Java Advanced Image Extensions Library
*    http://www.geo-solutions.it/
*    Copyright 2014 GeoSolutions


* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at

* http://www.apache.org/licenses/LICENSE-2.0

* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.eclipse.imagen.media.colorindexer;

import java.awt.image.IndexColorModel;

/**
 * A tool transforming a generic RGBA color into an index into a palette represented by a IndexedColorModel
 *
 * @author Andrea Aime - GeoSolutions
 */
public interface ColorIndexer {

    /** @return the {@link IndexColorModel} related to the {@link ColorIndexer} instance */
    public IndexColorModel toIndexColorModel();

    /** @return the closest integer palette value related to the input rgba elements */
    public int getClosestIndex(int r, int g, int b, int a);
}
